+1 for Chase Ink Preferred. Great signup bonus. Then after first year you can product change to Ink Cash after first year to avoid fee and get 5x at office stores. Can transfer points to United or Hyatt for great value! Do some research what is needed to get a biz card. Some people get them by selling stuff on ebay or don't even have a biz.
There is a targeted offer for United Club card. No signup bonus points but 2 free bags and United lounge access for a year is still a good deal.
https://thepointsguy.com/2018/01/uni...ed-annual-fee/